/*
 * Copyright (C) 2009  Sylvain Maucourt (smaucourt@gmail.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *
 */
package net.sylvek.where.server;

public final class UidHelper {

    private UidHelper()
    {

    }

    public final static String PREFIX = "fb://";

    public final static String getInternalUid(String externalUid)
    {
        return PREFIX + externalUid;
    }

    public final static String getExternalUid(String internalUid)
    {
        if (internalUid.startsWith(PREFIX)) {
            return internalUid.replace(PREFIX, "");
        } else {
            return internalUid;
        }
    }

    public final static String[] getArrayOfInternalUids(String externalUids)
    {
        // fix npe (found from appengine logs)
        if (externalUids == null) {
            return new String[0];
        }

        String[] uids = externalUids.split(",");
        for (int i = 0; i < uids.length; i++) {
            uids[i] = PREFIX + uids[i];
        }
        return uids;
    }
}
